Effect of far red and red light on a pelletable peroxidase activity in extracts from spinach leaves

The effect of in vitro irradiations on the pelletability of peroxidase activity was tested in extracts prepared from leaves of light-grown spinach (Spinacia oleracea cv. Nobel). It appeared that far red light increased the pelletable activity and that red light reversed this effect. This phytochrome-mediated effect occurred in a particulate fraction which banded at 39% (wt/wt) sucrose on an isopycnic density gradient.